Your search for "Penguin Knight MRL-001" revealed the following:
Penguin Knight - MRL-001 - Common - 1st Edition from Magic Ruler 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:When this card is sent directly from your deck to the Graveyard by an opponent's card effect, combine...
Penguin Knight - MRL-001 - Common - Unlimited from Magic Ruler Unlimited, available at 401 Games Canada. Rarity: Common Card Text:When this card is sent directly from your deck to the Graveyard by an opponent's card effect, combine your Graveyard...
Penguin Knight - SRL-EN001 - Common - 25th Anniversary Edition Unlimited from Spell Ruler (25th Anniversary Edition), available at 401 Games Canada. Rarity: Common Card Text:When this card is sent directly from your Deck to the Graveyard by an effect...
Penguin Knight - DB1-EN001 - Common from Dark Beginning 1, available at 401 Games Canada. Rarity: Common Card Text:When this card is sent directly from your Deck to the Graveyard by an effect of a card controlled by your opponent,...
Penguin Knight - SRL-001 - Common - Unlimited from Spell Ruler Unlimited, available at 401 Games Canada. Rarity: Common Card Text:When this card is sent directly from your Deck to the Graveyard by an effect of a card controlled by...